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A sample endplate potential (EPP; an average of 10 single EPPs) is shown at the top, and sample miniature endplate potentials (mEPPs) are shown at the bottom. Note the differences in the scales on the X- and Y-axes. Both are taken from recordings at the mouse neuromuscular junction.
The endplate potential is thus responsible for setting up an action potential in the muscle fiber which triggers muscle contraction. The transmission from nerve to muscle is so rapid because each quantum of acetylcholine reaches the endplate in millimolar concentrations, high enough to combine with a receptor with a low affinity, which then ...
The neuromuscular junction is a specialized synapse between a neuron and the muscle it innervates. It allows efferent signals from the nervous system to contract muscle fibers causing them to contract.
Schmorl's nodes are fairly common, especially with minor degeneration of the aging spine, but they are also seen in younger spines. Schmorl's nodes often cause no symptoms, but may simply reflect that "wear and tear" of the spine has occurred over time; they may also reflect that bone strength was at one time somewhat compromised, perhaps due to a vitamin D deficiency although this has yet to ...
Endplate Vertebral body; I Bulging gel: Discrete fibrous laminae: Hyaline, uniform thickness: Rounded margins II Peripheral white fibrous tissue: Mucinous material between laminae: Irregular thickness: Pointed margins III Consolidated fibrous tissue: Extensive mucinous infiltration; loss of annular-nuclear demarcation: Focal defects in cartilage
However, the endplates are generally parallel for each vertebra, so not all sources include usage of a superior versus inferior endplate in the definition. [ 2 ] Unless otherwise specified it is generally presumed to refer to angles in the coronal plane , such as projectional radiography in posteroanterior view.
In addition to the proteins mentioned, other proteins are then gathered, to form the endplate to the neuromuscular junction. The nerve terminates onto the endplate, forming the neuromuscular junction - a structure required to transmit nerve impulses to the muscle, and thus initiating muscle contraction.
Eburnation is a degenerative process of bone commonly found in patients with osteoarthritis or non-union of fractures.Friction in the joint causes the reactive conversion of the sub-chondral bone to an ivory-like surface at the site of the cartilage erosion. [1]